section.section
  header.section__header
    h2.section__title Properties
  div.section__content
    p outline.js 重构后，对外放 4 个重要的属性：anchors、drawer、chapters、reader 和 toolbar。它们都是独立的对象实例，提供了 outline.js 所有的能力（属性和方法）。
  include ./attrs
  include ./article
  include ./scrollElement
  include ./buttons
  include ./anchors
  include ./navigator
  include ./drawer
  include ./reader
  include ./toolbar
  include ./DEFAULTS
